A robust approach to fault tolerant controller design based on GIMC structure for non-minimum phase systems

This paper represents a robust scheme for designing fault tolerant controller (FTC) based on Generalized Internal Model Control structure, and extends it to non-minimum phase LTI systems. In this scheme, first the nominal controller is designed to have a closed-loop stability and acceptable performa...

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Bibliographic Details
Main Authors: Pezeshkian, M., Ozma, H., Khosrowjerdi, M. J.
Format: Conference Proceeding
Language:English
Subjects:
Actuators
Equations
Fault tolerance
Fault Tolerant Controller (FTC)
Generalized Internal Model Control (GIMC)
Mathematical model
NonMinimum Phase System
Robustness
Sensors
Transmission Zero-Assignment
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Summary:This paper represents a robust scheme for designing fault tolerant controller (FTC) based on Generalized Internal Model Control structure, and extends it to non-minimum phase LTI systems. In this scheme, first the nominal controller is designed to have a closed-loop stability and acceptable performance, and then by correcting the nominal controller based on the idea of GIMC, a robustification signal is imposed to compensate the actuator faults. The proposed scheme, deals with nonminimum phase systems by utilizing the idea of transmission zero-assignment. It will be shown that the problem of zero-assignment problem for state-accessible systems is equivalent to a pole-placement problem with state feedback on a reduced-order subspace, which always has a solution. The advantages of the proposed control scheme have been verified by the simulation on the quadruple-tank process subjected to the actuator fault.
DOI:10.1109/ICCIAutom.2011.6356720